I also vote #3 for the same reason as everyone else :)
On Thu, Mar 30, 2017 at 01:33:55PM -0400, Wayne Stambaugh wrote:
> I have found and fixed the bug in this bug report:
>
> https://bugs.launchpad.net/kicad/+bug/1677282
>
> This bug creates invalid schematic files which sets the component unit
> flag to 0 and breaks the netlist generator. The fix itself is simple.
> What is not simple is what to do about the invalid schematic files that
> have already been created. I added code to schematic parser to fix this
> but this creates a dilemma. Technically the schematic is modified which
> begs the question, what to do next. None of the following choices are
> particularly appealing:
>
> 1) Do nothing and leave the file in an invalid status until the next
> time the user saves the schematic. This is probably the most convenient
> but what about broken schematics being used by versions of kicad prior
> to this fix?
>
> 2) Set the schematic modified status which will trigger a save warning
> when eeschema is closed even if the user hasn't made any changes. We
> already do this with SCH_SCREEN::SchematicCleanUp() that gets called
> lots of places outside of schematic editing. The problem with this is
> that the user has no idea why they are getting a save warning when they
> didn't actually change anything.
>
> 3) Set the schematic modified status and inform the user that there was
> an error in their schematic file that was repaired on load and requires
> saving. This is the most informative for the user but reeks of nagware.
>
> 4) Silently save the corrected schematic with no user interaction. This
> will undoubtedly make VCS users unhappy.
>
> As much as I hate nagware, I like unexpected save warnings when I
> haven't changed anything even less so I'm leaning towards option 3. Any
> feedback would be appreciated.
>
> Thanks,
>
> Wayne
>
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